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<a name="1" href="#1">1</a>   <em class="comment">/*</em>
<a name="2" href="#2">2</a>   <em class="comment"> $Id: DefaultNameStep.java 1290 2007-04-17 01:26:35Z bewins $</em>
<a name="3" href="#3">3</a>   
<a name="4" href="#4">4</a>   <em class="comment"> Copyright 2003 The Werken Company. All Rights Reserved.</em>
<a name="5" href="#5">5</a>   <em class="comment"> </em>
<a name="6" href="#6">6</a>   <em class="comment">Redistribution and use in source and binary forms, with or without</em>
<a name="7" href="#7">7</a>   <em class="comment">modification, are permitted provided that the following conditions are</em>
<a name="8" href="#8">8</a>   <em class="comment">met:</em>
<a name="9" href="#9">9</a>   
<a name="10" href="#10">10</a>  <em class="comment">  * Redistributions of source code must retain the above copyright</em>
<a name="11" href="#11">11</a>  <em class="comment">    notice, this list of conditions and the following disclaimer.</em>
<a name="12" href="#12">12</a>  
<a name="13" href="#13">13</a>  <em class="comment">  * Redistributions in binary form must reproduce the above copyright</em>
<a name="14" href="#14">14</a>  <em class="comment">    notice, this list of conditions and the following disclaimer in the</em>
<a name="15" href="#15">15</a>  <em class="comment">    documentation and/or other materials provided with the distribution.</em>
<a name="16" href="#16">16</a>  
<a name="17" href="#17">17</a>  <em class="comment">  * Neither the name of the Jaxen Project nor the names of its</em>
<a name="18" href="#18">18</a>  <em class="comment">    contributors may be used to endorse or promote products derived </em>
<a name="19" href="#19">19</a>  <em class="comment">    from this software without specific prior written permission.</em>
<a name="20" href="#20">20</a>  
<a name="21" href="#21">21</a>  <em class="comment">THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS</em>
<a name="22" href="#22">22</a>  <em class="comment">IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED</em>
<a name="23" href="#23">23</a>  <em class="comment">TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A</em>
<a name="24" href="#24">24</a>  <em class="comment">PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER</em>
<a name="25" href="#25">25</a>  <em class="comment">OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,</em>
<a name="26" href="#26">26</a>  <em class="comment">EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,</em>
<a name="27" href="#27">27</a>  <em class="comment">PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR</em>
<a name="28" href="#28">28</a>  <em class="comment">PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF</em>
<a name="29" href="#29">29</a>  <em class="comment">LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING</em>
<a name="30" href="#30">30</a>  <em class="comment">NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS</em>
<a name="31" href="#31">31</a>  <em class="comment">SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</em>
<a name="32" href="#32">32</a>  
<a name="33" href="#33">33</a>  <em class="comment"> */</em>
<a name="34" href="#34">34</a>  <strong>package</strong> org.jaxen.expr;
<a name="35" href="#35">35</a>  
<a name="36" href="#36">36</a>  <strong>import</strong> java.util.ArrayList;
<a name="37" href="#37">37</a>  <strong>import</strong> java.util.Collections;
<a name="38" href="#38">38</a>  <strong>import</strong> java.util.Iterator;
<a name="39" href="#39">39</a>  <strong>import</strong> java.util.List;
<a name="40" href="#40">40</a>  
<a name="41" href="#41">41</a>  <strong>import</strong> org.jaxen.Context;
<a name="42" href="#42">42</a>  <strong>import</strong> org.jaxen.ContextSupport;
<a name="43" href="#43">43</a>  <strong>import</strong> org.jaxen.JaxenException;
<a name="44" href="#44">44</a>  <strong>import</strong> org.jaxen.UnresolvableException;
<a name="45" href="#45">45</a>  <strong>import</strong> org.jaxen.Navigator;
<a name="46" href="#46">46</a>  <strong>import</strong> org.jaxen.expr.iter.IterableAxis;
<a name="47" href="#47">47</a>  <strong>import</strong> org.jaxen.saxpath.Axis;
<a name="48" href="#48">48</a>  
<a name="49" href="#49">49</a>  <em>/**</em><em> </em>
<a name="50" href="#50">50</a>  <em> * Expression object that represents any flavor</em>
<a name="51" href="#51">51</a>  <em> * of name-test steps within an XPath.</em>
<a name="52" href="#52">52</a>  <em> * &lt;p></em>
<a name="53" href="#53">53</a>  <em> * This includes simple steps, such as "foo",</em>
<a name="54" href="#54">54</a>  <em> * non-default-axis steps, such as "following-sibling::foo"</em>
<a name="55" href="#55">55</a>  <em> * or "@foo", and namespace-aware steps, such</em>
<a name="56" href="#56">56</a>  <em> * as "foo:bar".</em>
<a name="57" href="#57">57</a>  <em> *</em>
<a name="58" href="#58">58</a>  <em> * @author bob mcwhirter (bob@werken.com)</em>
<a name="59" href="#59">59</a>  <em> * @author Stephen Colebourne</em>
<a name="60" href="#60">60</a>  <em> * @deprecated this class will become non-public in the future;</em>
<a name="61" href="#61">61</a>  <em> *     use the interface instead</em>
<a name="62" href="#62">62</a>  <em> */</em>
<a name="63" href="#63">63</a>  <strong>public</strong> <strong>class</strong> <a href="../../../org/jaxen/expr/DefaultNameStep.html">DefaultNameStep</a> <strong>extends</strong> <a href="../../../org/jaxen/expr/DefaultStep.html">DefaultStep</a> implements <a href="../../../org/jaxen/expr/NameStep.html">NameStep</a> {
<a name="64" href="#64">64</a>      
<a name="65" href="#65">65</a>      <em>/**</em>
<a name="66" href="#66">66</a>  <em>     * </em>
<a name="67" href="#67">67</a>  <em>     */</em>
<a name="68" href="#68">68</a>      <strong>private</strong> <strong>static</strong> <strong>final</strong> <strong>long</strong> serialVersionUID = 428414912247718390L;
<a name="69" href="#69">69</a>  
<a name="70" href="#70">70</a>      <em>/**</em><em> </em>
<a name="71" href="#71">71</a>  <em>     * Our prefix, bound through the current Context.</em>
<a name="72" href="#72">72</a>  <em>     * The empty-string ("") if no prefix was specified.</em>
<a name="73" href="#73">73</a>  <em>     * Decidedly NOT-NULL, due to SAXPath constraints.</em>
<a name="74" href="#74">74</a>  <em>     * This is the 'foo' in 'foo:bar'.</em>
<a name="75" href="#75">75</a>  <em>     */</em>
<a name="76" href="#76">76</a>      <strong>private</strong> String prefix;
<a name="77" href="#77">77</a>  
<a name="78" href="#78">78</a>      <em>/**</em>
<a name="79" href="#79">79</a>  <em>     * Our local-name.</em>
<a name="80" href="#80">80</a>  <em>     * This is the 'bar' in 'foo:bar'.</em>
<a name="81" href="#81">81</a>  <em>     */</em>
<a name="82" href="#82">82</a>      <strong>private</strong> String localName;
<a name="83" href="#83">83</a>  
<a name="84" href="#84">84</a>      <em>/**</em><em> Quick flag denoting if the local name was '*' */</em>
<a name="85" href="#85">85</a>      <strong>private</strong> <strong>boolean</strong> matchesAnyName;
<a name="86" href="#86">86</a>  
<a name="87" href="#87">87</a>      <em>/**</em><em> Quick flag denoting if we have a namespace prefix **/</em>
<a name="88" href="#88">88</a>      <strong>private</strong> <strong>boolean</strong> hasPrefix;
<a name="89" href="#89">89</a>  
<a name="90" href="#90">90</a>      <em>/**</em>
<a name="91" href="#91">91</a>  <em>     * Constructor.</em>
<a name="92" href="#92">92</a>  <em>     * </em>
<a name="93" href="#93">93</a>  <em>     * @param axis  the axis to work through</em>
<a name="94" href="#94">94</a>  <em>     * @param prefix  the name prefix</em>
<a name="95" href="#95">95</a>  <em>     * @param localName  the local name</em>
<a name="96" href="#96">96</a>  <em>     * @param predicateSet  the set of predicates</em>
<a name="97" href="#97">97</a>  <em>     */</em>    
<a name="98" href="#98">98</a>      <strong>public</strong> <a href="../../../org/jaxen/expr/DefaultNameStep.html">DefaultNameStep</a>(<a href="../../../org/jaxen/expr/iter/IterableAxis.html">IterableAxis</a> axis,
<a name="99" href="#99">99</a>                             String prefix,
<a name="100" href="#100">100</a>                            String localName,
<a name="101" href="#101">101</a>                            <a href="../../../org/jaxen/expr/PredicateSet.html">PredicateSet</a> predicateSet) {
<a name="102" href="#102">102</a>         <strong>super</strong>(axis, predicateSet);
<a name="103" href="#103">103</a> 
<a name="104" href="#104">104</a>         <strong>this</strong>.prefix = prefix;
<a name="105" href="#105">105</a>         <strong>this</strong>.localName = localName;
<a name="106" href="#106">106</a>         <strong>this</strong>.matchesAnyName = <span class="string">"*"</span>.equals(localName);
<a name="107" href="#107">107</a>         <strong>this</strong>.hasPrefix = (<strong>this</strong>.prefix != <strong>null</strong> &amp;&amp; <strong>this</strong>.prefix.length() > 0);
<a name="108" href="#108">108</a>     }
<a name="109" href="#109">109</a> 
<a name="110" href="#110">110</a>     <em>/**</em>
<a name="111" href="#111">111</a> <em>     * Gets the namespace prefix.</em>
<a name="112" href="#112">112</a> <em>     * </em>
<a name="113" href="#113">113</a> <em>     * @return the prefix</em>
<a name="114" href="#114">114</a> <em>     */</em>
<a name="115" href="#115">115</a>     <strong>public</strong> String getPrefix() {
<a name="116" href="#116">116</a>         <strong>return</strong> <strong>this</strong>.prefix;
<a name="117" href="#117">117</a>     }
<a name="118" href="#118">118</a> 
<a name="119" href="#119">119</a>     <em>/**</em>
<a name="120" href="#120">120</a> <em>     * Gets the local name.</em>
<a name="121" href="#121">121</a> <em>     * </em>
<a name="122" href="#122">122</a> <em>     * @return the local name</em>
<a name="123" href="#123">123</a> <em>     */</em>
<a name="124" href="#124">124</a>     <strong>public</strong> String getLocalName() {
<a name="125" href="#125">125</a>         <strong>return</strong> <strong>this</strong>.localName;
<a name="126" href="#126">126</a>     }
<a name="127" href="#127">127</a> 
<a name="128" href="#128">128</a>     <em>/**</em>
<a name="129" href="#129">129</a> <em>     * Does this step match any name? (i.e. Is it '*'?)</em>
<a name="130" href="#130">130</a> <em>     * </em>
<a name="131" href="#131">131</a> <em>     * @return true if it matches any name</em>
<a name="132" href="#132">132</a> <em>     */</em>
<a name="133" href="#133">133</a>     <strong>public</strong> <strong>boolean</strong> isMatchesAnyName() {
<a name="134" href="#134">134</a>         <strong>return</strong> matchesAnyName;
<a name="135" href="#135">135</a>     }
<a name="136" href="#136">136</a> 
<a name="137" href="#137">137</a>     <em>/**</em>
<a name="138" href="#138">138</a> <em>     * Gets the step as a fully defined XPath.</em>
<a name="139" href="#139">139</a> <em>     * </em>
<a name="140" href="#140">140</a> <em>     * @return the full XPath for this step</em>
<a name="141" href="#141">141</a> <em>     */</em>
<a name="142" href="#142">142</a>     <strong>public</strong> String getText() {
<a name="143" href="#143">143</a>         StringBuffer buf = <strong>new</strong> StringBuffer(64);
<a name="144" href="#144">144</a>         buf.append(getAxisName()).append(<span class="string">"::"</span>);
<a name="145" href="#145">145</a>         <strong>if</strong> (getPrefix() != <strong>null</strong> &amp;&amp; getPrefix().length() > 0) {
<a name="146" href="#146">146</a>             buf.append(getPrefix()).append(':');
<a name="147" href="#147">147</a>         }
<a name="148" href="#148">148</a>         <strong>return</strong> buf.append(getLocalName()).append(<strong>super</strong>.getText()).toString();
<a name="149" href="#149">149</a>     }
<a name="150" href="#150">150</a> 
<a name="151" href="#151">151</a>     <em>/**</em>
<a name="152" href="#152">152</a> <em>     * Evaluate the context node set to find the new node set.</em>
<a name="153" href="#153">153</a> <em>     * &lt;p></em>
<a name="154" href="#154">154</a> <em>     * This method overrides the version in &lt;code>DefaultStep&lt;/code> for performance.</em>
<a name="155" href="#155">155</a> <em>     */</em>
<a name="156" href="#156">156</a>     <strong>public</strong> List evaluate(<a href="../../../org/jaxen/Context.html">Context</a> context) throws JaxenException {
<a name="157" href="#157">157</a> 
<a name="158" href="#158">158</a>         List contextNodeSet  = context.getNodeSet();
<a name="159" href="#159">159</a>         <strong>int</strong> contextSize = contextNodeSet.size();
<a name="160" href="#160">160</a>         <em class="comment">// optimize for context size 0</em>
<a name="161" href="#161">161</a>         <strong>if</strong> (contextSize == 0) {
<a name="162" href="#162">162</a>             <strong>return</strong> Collections.EMPTY_LIST;
<a name="163" href="#163">163</a>         }
<a name="164" href="#164">164</a>         <a href="../../../org/jaxen/ContextSupport.html">ContextSupport</a> support = context.getContextSupport();
<a name="165" href="#165">165</a>         <a href="../../../org/jaxen/expr/iter/IterableAxis.html">IterableAxis</a> iterableAxis = getIterableAxis();
<a name="166" href="#166">166</a>         <strong>boolean</strong> namedAccess = (!matchesAnyName &amp;&amp; iterableAxis.supportsNamedAccess(support));
<a name="167" href="#167">167</a>         
<a name="168" href="#168">168</a>         <em class="comment">// optimize for context size 1 (common case, avoids lots of object creation)</em>
<a name="169" href="#169">169</a>         <strong>if</strong> (contextSize == 1) {
<a name="170" href="#170">170</a>             Object contextNode = contextNodeSet.get(0);
<a name="171" href="#171">171</a>             <strong>if</strong> (namedAccess) {
<a name="172" href="#172">172</a>                 <em class="comment">// get the iterator over the nodes and check it</em>
<a name="173" href="#173">173</a>                 String uri = <strong>null</strong>;
<a name="174" href="#174">174</a>                 <strong>if</strong> (hasPrefix) {
<a name="175" href="#175">175</a>                     uri = support.translateNamespacePrefixToUri(prefix);
<a name="176" href="#176">176</a>                     <strong>if</strong> (uri == <strong>null</strong>) {
<a name="177" href="#177">177</a>                         <strong>throw</strong> <strong>new</strong> <a href="../../../org/jaxen/UnresolvableException.html">UnresolvableException</a>(<span class="string">"XPath expression uses unbound namespace prefix "</span> + prefix);
<a name="178" href="#178">178</a>                     }
<a name="179" href="#179">179</a>                 }
<a name="180" href="#180">180</a>                 Iterator axisNodeIter = iterableAxis.namedAccessIterator(
<a name="181" href="#181">181</a>                                 contextNode, support, localName, prefix, uri);
<a name="182" href="#182">182</a>                 <strong>if</strong> (axisNodeIter == <strong>null</strong> || !axisNodeIter.hasNext()) {
<a name="183" href="#183">183</a>                     <strong>return</strong> Collections.EMPTY_LIST;
<a name="184" href="#184">184</a>                 }
<a name="185" href="#185">185</a> 
<a name="186" href="#186">186</a>                 <em class="comment">// convert iterator to list for predicate test</em>
<a name="187" href="#187">187</a>                 <em class="comment">// no need to filter as named access guarantees this</em>
<a name="188" href="#188">188</a>                 List <strong>new</strong>NodeSet = <strong>new</strong> ArrayList();
<a name="189" href="#189">189</a>                 <strong>while</strong> (axisNodeIter.hasNext()) {
<a name="190" href="#190">190</a>                     newNodeSet.add(axisNodeIter.next());
<a name="191" href="#191">191</a>                 }
<a name="192" href="#192">192</a>                 
<a name="193" href="#193">193</a>                 <em class="comment">// evaluate the predicates</em>
<a name="194" href="#194">194</a>                 <strong>return</strong> getPredicateSet().evaluatePredicates(newNodeSet, support);
<a name="195" href="#195">195</a>                 
<a name="196" href="#196">196</a>             } 
<a name="197" href="#197">197</a>             <strong>else</strong> {
<a name="198" href="#198">198</a>                 <em class="comment">// get the iterator over the nodes and check it</em>
<a name="199" href="#199">199</a>                 Iterator axisNodeIter = iterableAxis.iterator(contextNode, support);
<a name="200" href="#200">200</a>                 <strong>if</strong> (axisNodeIter == <strong>null</strong> || !axisNodeIter.hasNext()) {
<a name="201" href="#201">201</a>                     <strong>return</strong> Collections.EMPTY_LIST;
<a name="202" href="#202">202</a>                 }
<a name="203" href="#203">203</a> 
<a name="204" href="#204">204</a>                 <em class="comment">// run through iterator, filtering using matches()</em>
<a name="205" href="#205">205</a>                 <em class="comment">// adding to list for predicate test</em>
<a name="206" href="#206">206</a>                 List <strong>new</strong>NodeSet = <strong>new</strong> ArrayList(contextSize);
<a name="207" href="#207">207</a>                 <strong>while</strong> (axisNodeIter.hasNext()) {
<a name="208" href="#208">208</a>                     Object eachAxisNode = axisNodeIter.next();
<a name="209" href="#209">209</a>                     <strong>if</strong> (matches(eachAxisNode, support)) {
<a name="210" href="#210">210</a>                         newNodeSet.add(eachAxisNode);
<a name="211" href="#211">211</a>                     }
<a name="212" href="#212">212</a>                 }
<a name="213" href="#213">213</a>                 
<a name="214" href="#214">214</a>                 <em class="comment">// evaluate the predicates</em>
<a name="215" href="#215">215</a>                 <strong>return</strong> getPredicateSet().evaluatePredicates(newNodeSet, support);
<a name="216" href="#216">216</a>             }
<a name="217" href="#217">217</a>         }
<a name="218" href="#218">218</a> 
<a name="219" href="#219">219</a>         <em class="comment">// full case</em>
<a name="220" href="#220">220</a>         <a href="../../../org/jaxen/expr/IdentitySet.html">IdentitySet</a> unique = <strong>new</strong> <a href="../../../org/jaxen/expr/IdentitySet.html">IdentitySet</a>();
<a name="221" href="#221">221</a>         List interimSet = <strong>new</strong> ArrayList(contextSize);
<a name="222" href="#222">222</a>         List <strong>new</strong>NodeSet = <strong>new</strong> ArrayList(contextSize);
<a name="223" href="#223">223</a>         
<a name="224" href="#224">224</a>         <strong>if</strong> (namedAccess) {
<a name="225" href="#225">225</a>             String uri = <strong>null</strong>;
<a name="226" href="#226">226</a>             <strong>if</strong> (hasPrefix) {
<a name="227" href="#227">227</a>                 uri = support.translateNamespacePrefixToUri(prefix);
<a name="228" href="#228">228</a>                 <strong>if</strong> (uri == <strong>null</strong>) {
<a name="229" href="#229">229</a>                     <strong>throw</strong> <strong>new</strong> <a href="../../../org/jaxen/UnresolvableException.html">UnresolvableException</a>(<span class="string">"XPath expression uses unbound namespace prefix "</span> + prefix);
<a name="230" href="#230">230</a>                 }
<a name="231" href="#231">231</a>             }
<a name="232" href="#232">232</a>             <strong>for</strong> (<strong>int</strong> i = 0; i &lt; contextSize; ++i) {
<a name="233" href="#233">233</a>                 Object eachContextNode = contextNodeSet.get(i);
<a name="234" href="#234">234</a> 
<a name="235" href="#235">235</a>                 Iterator axisNodeIter = iterableAxis.namedAccessIterator(
<a name="236" href="#236">236</a>                                 eachContextNode, support, localName, prefix, uri);
<a name="237" href="#237">237</a>                 <strong>if</strong> (axisNodeIter == <strong>null</strong> || !axisNodeIter.hasNext()) {
<a name="238" href="#238">238</a>                     <strong>continue</strong>;
<a name="239" href="#239">239</a>                 }
<a name="240" href="#240">240</a> 
<a name="241" href="#241">241</a> 				<strong>while</strong> (axisNodeIter.hasNext())
<a name="242" href="#242">242</a> 				{
<a name="243" href="#243">243</a> 					Object eachAxisNode = axisNodeIter.next();
<a name="244" href="#244">244</a> 					interimSet.add(eachAxisNode);
<a name="245" href="#245">245</a> 				}
<a name="246" href="#246">246</a> 
<a name="247" href="#247">247</a> 				<em class="comment">// evaluate the predicates</em>
<a name="248" href="#248">248</a> 				List predicateNodes = getPredicateSet().evaluatePredicates(interimSet, support);
<a name="249" href="#249">249</a> 
<a name="250" href="#250">250</a> 				<em class="comment">// ensure only one of each node in the result</em>
<a name="251" href="#251">251</a> 				Iterator predicateNodeIter = predicateNodes.iterator();
<a name="252" href="#252">252</a> 				<strong>while</strong> (predicateNodeIter.hasNext())
<a name="253" href="#253">253</a> 				{
<a name="254" href="#254">254</a> 					Object eachPredicateNode = predicateNodeIter.next();
<a name="255" href="#255">255</a> 					<strong>if</strong> (! unique.contains(eachPredicateNode))
<a name="256" href="#256">256</a> 					{
<a name="257" href="#257">257</a> 						unique.add(eachPredicateNode);
<a name="258" href="#258">258</a> 						newNodeSet.add(eachPredicateNode);
<a name="259" href="#259">259</a> 					}
<a name="260" href="#260">260</a> 				}
<a name="261" href="#261">261</a> 				interimSet.clear();
<a name="262" href="#262">262</a> 			}
<a name="263" href="#263">263</a>             
<a name="264" href="#264">264</a>         } <strong>else</strong> {
<a name="265" href="#265">265</a>             <strong>for</strong> (<strong>int</strong> i = 0; i &lt; contextSize; ++i) {
<a name="266" href="#266">266</a>                 Object eachContextNode = contextNodeSet.get(i);
<a name="267" href="#267">267</a> 
<a name="268" href="#268">268</a>                 Iterator axisNodeIter = axisIterator(eachContextNode, support);
<a name="269" href="#269">269</a>                 <strong>if</strong> (axisNodeIter == <strong>null</strong> || !axisNodeIter.hasNext()) {
<a name="270" href="#270">270</a>                     <strong>continue</strong>;
<a name="271" href="#271">271</a>                 }
<a name="272" href="#272">272</a> 
<a name="273" href="#273">273</a>                 <em class="comment">/*<em class="comment"> See jaxen-106. Might be able to optimize this by doing</em></em>
<a name="274" href="#274">274</a> <em class="comment">                 * specific matching for individual axes. For instance on namespace axis</em>
<a name="275" href="#275">275</a> <em class="comment">                 * we should only get namespace nodes and on attribute axes we only get </em>
<a name="276" href="#276">276</a> <em class="comment">                 * attribute nodes. Self and parent axes have single members.</em>
<a name="277" href="#277">277</a> <em class="comment">                 * Children, descendant, ancestor, and sibling axes never </em>
<a name="278" href="#278">278</a> <em class="comment">                 * see any attributes or namespaces</em>
<a name="279" href="#279">279</a> <em class="comment">                 */</em>
<a name="280" href="#280">280</a>                 
<a name="281" href="#281">281</a>                 <em class="comment">// ensure only unique matching nodes in the result</em>
<a name="282" href="#282">282</a>                 <strong>while</strong> (axisNodeIter.hasNext()) {
<a name="283" href="#283">283</a>                     Object eachAxisNode = axisNodeIter.next();
<a name="284" href="#284">284</a> 
<a name="285" href="#285">285</a>                     <strong>if</strong> (matches(eachAxisNode, support)) {
<a name="286" href="#286">286</a> 						interimSet.add(eachAxisNode);
<a name="287" href="#287">287</a>                     }
<a name="288" href="#288">288</a>                 }
<a name="289" href="#289">289</a> 
<a name="290" href="#290">290</a>                 <em class="comment">// evaluate the predicates</em>
<a name="291" href="#291">291</a> 				List predicateNodes = getPredicateSet().evaluatePredicates(interimSet, support);
<a name="292" href="#292">292</a> 
<a name="293" href="#293">293</a> 				<em class="comment">// ensure only one of each node in the result</em>
<a name="294" href="#294">294</a> 				Iterator predicateNodeIter = predicateNodes.iterator();
<a name="295" href="#295">295</a> 				<strong>while</strong> (predicateNodeIter.hasNext())
<a name="296" href="#296">296</a> 				{
<a name="297" href="#297">297</a> 					Object eachPredicateNode = predicateNodeIter.next();
<a name="298" href="#298">298</a> 					<strong>if</strong> (! unique.contains(eachPredicateNode))
<a name="299" href="#299">299</a> 					{
<a name="300" href="#300">300</a> 						unique.add(eachPredicateNode);
<a name="301" href="#301">301</a> 						newNodeSet.add(eachPredicateNode);
<a name="302" href="#302">302</a> 					}
<a name="303" href="#303">303</a> 				}
<a name="304" href="#304">304</a>                 interimSet.clear();
<a name="305" href="#305">305</a>             }
<a name="306" href="#306">306</a>         }
<a name="307" href="#307">307</a>         
<a name="308" href="#308">308</a>         <strong>return</strong> newNodeSet;
<a name="309" href="#309">309</a>     }
<a name="310" href="#310">310</a>     
<a name="311" href="#311">311</a>     <em>/**</em>
<a name="312" href="#312">312</a> <em>     * Checks whether the node matches this step.</em>
<a name="313" href="#313">313</a> <em>     * </em>
<a name="314" href="#314">314</a> <em>     * @param node  the node to check</em>
<a name="315" href="#315">315</a> <em>     * @param contextSupport  the context support</em>
<a name="316" href="#316">316</a> <em>     * @return true if matches</em>
<a name="317" href="#317">317</a> <em>     * @throws JaxenException </em>
<a name="318" href="#318">318</a> <em>     */</em>
<a name="319" href="#319">319</a>     <strong>public</strong> <strong>boolean</strong> matches(Object node, <a href="../../../org/jaxen/ContextSupport.html">ContextSupport</a> contextSupport) throws JaxenException {
<a name="320" href="#320">320</a>         
<a name="321" href="#321">321</a>         <a href="../../../org/jaxen/Navigator.html">Navigator</a> nav  = contextSupport.getNavigator();
<a name="322" href="#322">322</a>         String myUri = <strong>null</strong>;
<a name="323" href="#323">323</a>         String nodeName = <strong>null</strong>;
<a name="324" href="#324">324</a>         String nodeUri = <strong>null</strong>;
<a name="325" href="#325">325</a> 
<a name="326" href="#326">326</a>         <strong>if</strong> (nav.isElement(node)) {
<a name="327" href="#327">327</a>             nodeName = nav.getElementName(node);
<a name="328" href="#328">328</a>             nodeUri = nav.getElementNamespaceUri(node);
<a name="329" href="#329">329</a>         } 
<a name="330" href="#330">330</a>         <strong>else</strong> <strong>if</strong> (nav.isText(node)) {
<a name="331" href="#331">331</a>             <strong>return</strong> false;
<a name="332" href="#332">332</a>         } 
<a name="333" href="#333">333</a>         <strong>else</strong> <strong>if</strong> (nav.isAttribute(node)) {
<a name="334" href="#334">334</a>             <strong>if</strong> (getAxis() != Axis.ATTRIBUTE) {
<a name="335" href="#335">335</a>                 <strong>return</strong> false;
<a name="336" href="#336">336</a>             }
<a name="337" href="#337">337</a>             nodeName = nav.getAttributeName(node);
<a name="338" href="#338">338</a>             nodeUri = nav.getAttributeNamespaceUri(node);
<a name="339" href="#339">339</a>             
<a name="340" href="#340">340</a>         } 
<a name="341" href="#341">341</a>         <strong>else</strong> <strong>if</strong> (nav.isDocument(node)) {
<a name="342" href="#342">342</a>             <strong>return</strong> false;
<a name="343" href="#343">343</a>         } 
<a name="344" href="#344">344</a>         <strong>else</strong> <strong>if</strong> (nav.isNamespace(node)) {
<a name="345" href="#345">345</a>             <strong>if</strong> (getAxis() != Axis.NAMESPACE) {
<a name="346" href="#346">346</a>                 <em class="comment">// Only works for namespace::*</em>
<a name="347" href="#347">347</a>                 <strong>return</strong> false;
<a name="348" href="#348">348</a>             }
<a name="349" href="#349">349</a>             nodeName = nav.getNamespacePrefix(node);
<a name="350" href="#350">350</a>         } 
<a name="351" href="#351">351</a>         <strong>else</strong> {
<a name="352" href="#352">352</a>             <strong>return</strong> false;
<a name="353" href="#353">353</a>         }
<a name="354" href="#354">354</a> 
<a name="355" href="#355">355</a>         <strong>if</strong> (hasPrefix) {
<a name="356" href="#356">356</a>             myUri = contextSupport.translateNamespacePrefixToUri(<strong>this</strong>.prefix);
<a name="357" href="#357">357</a>             <strong>if</strong> (myUri == <strong>null</strong>) {
<a name="358" href="#358">358</a>             	<strong>throw</strong> <strong>new</strong> <a href="../../../org/jaxen/UnresolvableException.html">UnresolvableException</a>(<span class="string">"Cannot resolve namespace prefix '"</span>+<strong>this</strong>.prefix+<span class="string">"'"</span>);
<a name="359" href="#359">359</a>             }
<a name="360" href="#360">360</a>         } 
<a name="361" href="#361">361</a>         <strong>else</strong> <strong>if</strong> (matchesAnyName) {
<a name="362" href="#362">362</a>             <strong>return</strong> <strong>true</strong>;
<a name="363" href="#363">363</a>         }
<a name="364" href="#364">364</a> 
<a name="365" href="#365">365</a>         <em class="comment">// If we map to a non-empty namespace and the node does not</em>
<a name="366" href="#366">366</a>         <em class="comment">// or vice-versa, fail-fast.</em>
<a name="367" href="#367">367</a>         <strong>if</strong> (hasNamespace(myUri) != hasNamespace(nodeUri)) {
<a name="368" href="#368">368</a>             <strong>return</strong> false;
<a name="369" href="#369">369</a>         }
<a name="370" href="#370">370</a>         
<a name="371" href="#371">371</a>         <em class="comment">// To fail-fast, we check the equality of</em>
<a name="372" href="#372">372</a>         <em class="comment">// local-names first.  Shorter strings compare</em>
<a name="373" href="#373">373</a>         <em class="comment">// quicker.</em>
<a name="374" href="#374">374</a>         <strong>if</strong> (matchesAnyName || nodeName.equals(getLocalName())) {
<a name="375" href="#375">375</a>             <strong>return</strong> matchesNamespaceURIs(myUri, nodeUri);
<a name="376" href="#376">376</a>         }
<a name="377" href="#377">377</a> 
<a name="378" href="#378">378</a>         <strong>return</strong> false;
<a name="379" href="#379">379</a>     }
<a name="380" href="#380">380</a> 
<a name="381" href="#381">381</a>     <em>/**</em>
<a name="382" href="#382">382</a> <em>     * Checks whether the URI represents a namespace.</em>
<a name="383" href="#383">383</a> <em>     * </em>
<a name="384" href="#384">384</a> <em>     * @param uri  the URI to check</em>
<a name="385" href="#385">385</a> <em>     * @return true if non-null and non-empty</em>
<a name="386" href="#386">386</a> <em>     */</em>
<a name="387" href="#387">387</a>     <strong>private</strong> <strong>boolean</strong> hasNamespace(String uri) {
<a name="388" href="#388">388</a>         <strong>return</strong> (uri != <strong>null</strong> &amp;&amp; uri.length() > 0);
<a name="389" href="#389">389</a>     }
<a name="390" href="#390">390</a> 
<a name="391" href="#391">391</a>     <em>/**</em>
<a name="392" href="#392">392</a> <em>     * Compares two namespace URIs, handling null.</em>
<a name="393" href="#393">393</a> <em>     * </em>
<a name="394" href="#394">394</a> <em>     * @param uri1  the first URI</em>
<a name="395" href="#395">395</a> <em>     * @param uri2  the second URI</em>
<a name="396" href="#396">396</a> <em>     * @return true if equal, where null==""</em>
<a name="397" href="#397">397</a> <em>     */</em>
<a name="398" href="#398">398</a>     <strong>protected</strong> <strong>boolean</strong> matchesNamespaceURIs(String uri1, String uri2) {
<a name="399" href="#399">399</a>         <strong>if</strong> (uri1 == uri2) {
<a name="400" href="#400">400</a>             <strong>return</strong> <strong>true</strong>;
<a name="401" href="#401">401</a>         }
<a name="402" href="#402">402</a>         <strong>if</strong> (uri1 == <strong>null</strong>) {
<a name="403" href="#403">403</a>             <strong>return</strong> (uri2.length() == 0);
<a name="404" href="#404">404</a>         }
<a name="405" href="#405">405</a>         <strong>if</strong> (uri2 == <strong>null</strong>) {
<a name="406" href="#406">406</a>             <strong>return</strong> (uri1.length() == 0);
<a name="407" href="#407">407</a>         }
<a name="408" href="#408">408</a>         <strong>return</strong> uri1.equals(uri2);
<a name="409" href="#409">409</a>     }
<a name="410" href="#410">410</a>     
<a name="411" href="#411">411</a>     <em>/**</em>
<a name="412" href="#412">412</a> <em>     * Returns a full information debugging string.</em>
<a name="413" href="#413">413</a> <em>     * </em>
<a name="414" href="#414">414</a> <em>     * @return a debugging string</em>
<a name="415" href="#415">415</a> <em>     */</em>
<a name="416" href="#416">416</a>     <strong>public</strong> String toString() {
<a name="417" href="#417">417</a>         String prefix = getPrefix();
<a name="418" href="#418">418</a>         String qName = <span class="string">""</span>.equals(prefix) ? getLocalName() : getPrefix() + <span class="string">":"</span> + getLocalName();
<a name="419" href="#419">419</a>         <strong>return</strong> <span class="string">"[(DefaultNameStep): "</span> +  qName +  <span class="string">"]"</span>;
<a name="420" href="#420">420</a>     }
<a name="421" href="#421">421</a> 
<a name="422" href="#422">422</a> }
</pre>
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